Such being the position of their forces in the field, the Carthaginians, finding themselves hemmed in on every side, were compelled to have recourse to the help of the free states in alliance with them. Now Hiero, of Syracuse, had during this war been all along exceedingly anxious to do everything which the Carthaginians asked him; and at this point of it was more forward to do so than ever, from a conviction that it was for his interest, with a view alike to his own sovereignty and to his friendship with Rome, that Carthage should not perish, and so leave the superior power to work its own will without resistance. And his reasoning was entirely sound and prudent. It is never right to permit such a state of things; nor to help any one to build up so preponderating a power as to make resistance to it impossible, however just the cause. Not that the Romans themselves had failed to observe the obligations of the treaty, or were showing any failure of friendly dispositions; though at first a question had arisen between the two powers, from the following circumstance. At the beginning of the war, certain persons sailing from Italy with provisions for the mutineers, the Carthaginians captured them and forced them to land in their own harbour; and presently had as many as five hundred such persons in their prisons. This caused considerable annoyance at Rome: but, after sending ambassadors to Carthage and recovering possession of the men by diplomatic means, the Romans were so much gratified that, by way of returning the favour, they restored the prisoners made in the Sicilian war whom they still retained; and from that time forth responded cheerfully and generously to all requests made to them. They allowed their merchants to export to Carthage whatever from time to time was wanted, and prohibited those who were exporting to the mutineers. When, subsequently, the mercenaries in Sardinia, having revolted from Carthage, invited their interference on the island, they did not respond to the invitation; nor when the people of Utica offered them their submission did they accept it, but kept strictly to the engagements contained in the treaty.